藏南拉轨岗日变质核杂岩带的TM影像特征

基金项目:

中国地质调查局"1∶25万定结幅、陈塘区幅(国内部分) 区域地质调查" 20001300009231

Characteristic from TM Image of Laguigangri Metamorphic Core Complex Zone in Southern Tibet

摘要: 通过对拉轨岗日地区TM图像进行主成分变换、缨帽变换、比值运算等数字处理, 其成果图像进一步印证了拉轨岗日变质核杂岩带具有典型三层结构这一野外区调成果.通过对系列成果图像的分析对比, 总结了变质核、接触带和盖层的影像特征, 分析了拉轨岗日构造带各变质核杂岩之间的变化规律.
- 遥感 /
- TM图像 /
- 变质核杂岩 /
- 影像特征 /
- 拉轨岗日 /
- 西藏
Abstract: The digital processing of the TM image of Laguigangri area, such as K-L transform, K-T transform, and ratio operation has confirmed in the result images, the typical three-layer configuration of Laguigangri metamorphic core complex zone. Moreover, the analysis and contrast of a series of result images have enabled the authors to have summarized the image characteristics of the core, the contact belt and the cover of Laguigangri metamorphic core complex zone. At last, they have put forward the changing law among the Laguigangri metamorphic core complex zone.
- remote sensing /
- TM image /
- metamorphic core complex /
- image characteristics /
- Laguigangri /
- Tibet

图 1 尼日啊—普吓鲁构造剖面^[1]

1.板岩; 2.变质砂岩; 3.石英岩; 4.大理岩; 5.片麻岩; 6.石榴片岩; 7.花岗岩; 8.韧性剪切带; 9.拆离断层

Fig. 1. Tectonic cross section from Niria to Puxialu

下载: 全尺寸图片幻灯片

图 2 假彩色合成图像

a.用主成分变换的第3, 4, 5主组分所做的假彩色合成图像; b.用缨帽变换的第5, 3, 2主分量所做的假彩色合成图像

Fig. 2. Pseudo color composite image

下载: 全尺寸图片幻灯片

图 3 TM7/TM6基本比值图像

Fig. 3. Basic ratio image of TM7/TM6

下载: 全尺寸图片幻灯片

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